ATxmega16A4U Atmel Corporation, ATxmega16A4U Datasheet - Page 185

• Manufacturer Part Number: ATxmega16A4U
• Manufacturer: Atmel Corporation

Specifications of ATxmega16A4U

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 34
• Ext Interrupts: 34
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 7
• Twi (i2c): 2
• Uart: 5
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 3.3
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.6 to 3.6
• Operating Voltage (vcc): 1.6 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 5
• Output Compare Channels: 16
• Input Capture Channels: 16
• Pwm Channels: 16
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

14.12.12 CNTL – Counter Register L
14.12.13 CNTH – Counter Register H
14.12.14 PERL – Period Register L
8331A–AVR–07/11
For more details, refer to
The CNTH and CNTL register pair represents the 16-bit value, CNT. CNT contains the 16-bit
counter value in the timer/counter. CPU and DMA write access has priority over count, clear, or
reload of the counter.
For more details on reading and writing 16-bit registers, refer to
page
• Bit 7:0 – CNT[7:0]
These bits hold the LSB of the 16-bit counter register.
• Bit 7:0 – CNT[15:8]
These bits hold the MSB of the 16-bit counter register.
The PERH and PERL register pair represents the 16-bit value, PER. PER contains the 16-bit
TOP value in the timer/counter.
• Bit 7:0 – PER[7:0]
These bits hold the LSB of the 16-bit period register.
Bit
+0x0F
Read/Write
Initial Value
Bit
+0x20
Read/Write
Initial Value
Bit
+0x21
Read/Write
Initial Value
Bit
+0x26
Read/Write
Initial Value
12.
R/W
R/W
R/W
R/W
7
0
7
0
7
0
7
1
R/W
R/W
R/W
R/W
6
0
6
0
6
0
6
1
”Accessing 16-bit Registers” on page
R/W
R/W
R/W
R/W
5
0
5
0
5
0
5
1
R/W
R/W
R/W
R/W
4
0
4
0
4
0
4
1
TEMP[7:0]
CNT[15:8]
CNT[7:0]
PER[7:0]
Atmel AVR XMEGA AU
R/W
R/W
R/W
R/W
3
0
3
0
3
0
3
1
R/W
R/W
R/W
R/W
2
0
2
0
2
0
2
1
12.
”Accessing 16-bit Registers” on
R/W
R/W
R/W
R/W
1
0
1
0
1
0
1
1
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
1
TEMP
CNTH
CNTL
PERL
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